2.5 takes long to start/hard starting

ed695 · 03-29-2009, 09:23 PM

hello please help me out i have a 1997 jeep tj 2.5 with 184000km everytime i go to start it, it cranks for quite a while then eventualy fires, now i already looked at a few things such as, when i turn the key i can hear the pump run, i replaced the rotar, cap, wired and plugs... what seems to be working right now is to turn the key on and off three times then start it, it fires pretty much right away does anyone have any ideas or advice thanks

twiz · 03-29-2009, 09:52 PM

There's a check valve in the pump that can go bad and what happens is the fuel drains back into the tank after it's shut off. When you go to start it the pump has to fill the lines up with fuel before it can start to build pressure, this will delay the starting. By cycling the key on and off you are filling the lines up with fuel and helping it to build pressure. You have to replace the pump to fix it or just cycle the key before you start it and take care of that problem if the pump goes out.

twiz · 03-29-2009, 10:04 PM

I did some checking and that has a returnless fuel system. There's a regulator on the top of the fuel pump assembly that could be bad.

ed695 · 03-30-2009, 11:40 AM

thanks for the help, could it be something else such as a clogged line, crank sensor or something else? pumps are expensive and just want to make sure that thats the prob thanks again

ed695 · 03-30-2009, 01:03 PM

would also like to add that when its running it runs great

peaceinvermont · 03-30-2009, 02:15 PM

I have recall on sending unit,so when there in the area i want to replace everything! (extra charge) fuel pump/regulator & filter...am i missing anything else? I will also have them install new purejeep gastank skid,whenever it gets here,lol (hope all this will fix my starting prob.) GOODLUCK w/yours also!!

ed695 · 03-31-2009, 09:52 AM

took my jeep into the shop when the jeep is running the pressure is fine as soon as they shut it off i loose it all right away they are saying i need to replace the pressure regulator, so i will end up changing the pump, filter, regulator and other components in the tank..... will post if this works thanks for the replies

03-30-2009, 11:40 AM	#4
ed695 Registered User Join Date: Mar 2009 Location: Timmins Posts: 19 Profile Gallery Classifieds My Jeeps	thanks for the help, could it be something else such as a clogged line, crank sensor or something else? pumps are expensive and just want to make sure that thats the prob thanks again

03-30-2009, 01:03 PM	#5
ed695 Registered User Join Date: Mar 2009 Location: Timmins Posts: 19 Profile Gallery Classifieds My Jeeps	would also like to add that when its running it runs great

03-31-2009, 09:52 AM	#7
ed695 Registered User Join Date: Mar 2009 Location: Timmins Posts: 19 Profile Gallery Classifieds My Jeeps	took my jeep into the shop when the jeep is running the pressure is fine as soon as they shut it off i loose it all right away they are saying i need to replace the pressure regulator, so i will end up changing the pump, filter, regulator and other components in the tank..... will post if this works thanks for the replies